<template>
    <div id="aCoursesList" class="bg-fa of"> 
        <!-- /课程详情 开始 -->
        <section class="container">
            <section class="path-wrap txtOf hLh30">
                <a href="#" title class="c-999 fsize14">首页</a> 
                \
                <a href="#" title class="c-999 fsize14">{{courseWebVo.subjectLevelOne}}</a> 
                \
                <span class="c-333 fsize14">{{courseWebVo.subjectLevelTwo}}</span> 
            </section>
            <div>
                <article class="c-v-pic-wrap" style="height: 357px;"> 
                    <section class="p-h-video-box" id="videoPlay">
                        <img height="357px" :src="courseWebVo.cover" :alt="courseWebVo.title" class="dis c-v-pic">
                    </section> 
                </article>
                <aside class="c-attr-wrap">
                    <section class="ml20 mr15">
                        <h2 class="hLh30 txtOf mt15">
                            <span class="c-fff fsize24">{{courseWebVo.title}}</span> 
                        </h2>
                        <section class="c-attr-jg">
                            <span class="c-fff">价格：</span>
                            <b class="c-yellow" style="font-size:24px;">￥{{courseWebVo.price}}</b> 
                        </section>
                        <section class="c-attr-mt c-attr-undis">
                            <span class="c-fff fsize14">主讲： {{courseWebVo.teacherName}}&nbsp;&nbsp;&nbsp;</span> 
                        </section>
                        <section class="c-attr-mt of"> 
                            <span class="ml10 vam">
                                <em class="icon18 scIcon"></em>
                                <a class="c-fff vam" title="收藏" href="#" >收藏</a> 
                            </span>
                        </section>
                        <section class="c-attr-mt" v-if="isbuy || Number(courseWebVo.price) === 0">
                            <a href="#" title="立即观看" class="comm-btn c-btn-3">立即观看</a>
                        </section> 
                        <section class="c-attr-mt" v-else>
                            <a @click="createOrders()" href="#" title="立即购买" class="comm-btn c-btn-3">立即购买</a>
                        </section> 
                    </section>
                </aside>
                <aside class="thr-attr-box">
                    <ol class="thr-attr-ol clearfix">
                        <li>
                            <p>&nbsp;</p> 
                            <aside>
                                <span class="c-fff f-fM">购买数</span> 
                                <br>
                                <h6 class="c-fff f-fM mt10">{{courseWebVo.buyCount}}</h6>
                            </aside> 
                        </li>
                        <li>
                            <p>&nbsp;</p> 
                            <aside>
                                <span class="c-fff f-fM">课时数</span> 
                                <br>
                                <h6 class="c-fff f-fM mt10">{{courseWebVo.lessonNum}}</h6> 
                            </aside>
                        </li> 
                        <li>
                            <p>&nbsp;</p> 
                            <aside>
                                <span class="c-fff f-fM">浏览数</span> 
                                <br>
                                <h6 class="c-fff f-fM mt10">{{courseWebVo.viewCount}}</h6> 
                            </aside>
                        </li> 
                    </ol>
                </aside>
                <div class="clear"></div> 
            </div>
            <!-- /课程封面介绍 -->
            <div class="mt20 c-infor-box">
                <article class="fl col-7">
                    <section class="mr30">
                        <div class="i-box">
                            <div>
                                <section id="c-i-tabTitle" class="c-infor-tabTitle c-tab-title">
                                    <a name="c-i" class="current" title="课程详情">课程详情</a> 
                                </section>
                            </div>
                            <article class="ml10 mr10 pt20">
                                <div>
                                    <h6 class="c-i-content c-infor-title"> 
                                        <span>课程介绍</span>
                                    </h6>
                                    <div class="course-txt-body-wrap"> 
                                        <section class="course-txt-body">
                                            <!-- 将内容中的html翻译过来 -->
                                            <p v-html="courseWebVo.description">
                                                {{courseWebVo.description}}
                                            </p>
                                        </section>
                                    </div> 
                                </div>
                                <!-- /课程介绍 --> 
                                <div class="mt50">
                                    <h6 class="c-g-content c-infor-title"> 
                                        <span>课程大纲</span>
                                    </h6>
                                    <section class="mt20">
                                        <div class="lh-menu-wrap">
                                            <menu id="lh-menu" class="lh-menu mt10 mr10">
                                                <ul>
                                                    <!-- 文件目录 -->
                                                    <li class="lh-menu-stair" v-for="chapter in chapterVideoList" :key="chapter.id">
                                                        <a href="javascript: void(0)" :title="chapter.title" class="current-1">
                                                            <em class="lh-menu-i-1 icon18 mr10"></em>{{chapter.title}} 
                                                        </a>
                                                        <ol class="lh-menu-ol" style="display: block;">
                                                            <li class="lh-menu-second ml30" v-for="video in chapter.children" :key="video.id">
                                                                <a :href="'/player/' + video.videoSourceId" :title="video.title" target="_blank"> 
                                                                    <span class="fr">
                                                                        <i class="free-icon vam mr10">免费试听</i> 
                                                                    </span>
                                                                    <em class="lh-menu-i-2 icon16 mr5">&nbsp;</em>{{video.title}}
                                                                </a> 
                                                            </li>
                                                        </ol> 
                                                    </li>
                                                </ul> 
                                            </menu>
                                        </div> 
                                    </section>
                                </div>
                                <!-- /课程大纲 -->

                                <!-- 课程评论 -->
                                <div class="mt50 commentHtml">
                                    <h6 class="c-c-content c-infor-title" id="i-art-comment"> 
                                        <span class="commentTitle">课程评论</span>
                                    </h6>
                                    <section class="lh-bj-list pr mt20 replyhtml">
                                        <ul>
                                            <li class="unBr">
                                                <aside class="noter-pic">
                                                    <img width="50" height="50" class="picImg" src="~/assets/img/avatar-boy.gif"> 
                                                </aside>
                                                <div class="of">
                                                    <section class="n-reply-wrap">
                                                        <fieldset>
                                                            <textarea name="" v-model="comment.content" placeholder="输入您要评论的文字" id="commentContent"></textarea>
                                                        </fieldset>
                                                        <p class="of mt5 tar pl10 pr10">
                                                            <span class="fl ">
                                                                <tt class="c-red commentContentmeg" style="display: none;"></tt>
                                                            </span>
                                                            <input type="button" @click="addComment()" value="回复" class="lh-reply-btn">
                                                        </p> 
                                                    </section>
                                                </div> 
                                            </li>
                                        </ul> 
                                    </section>
                                    <section class="">
                                        <section class="question-list lh-bj-list pr"> 
                                            <ul class="pr10">
                                                <li v-for="(comment,index) in data.items" v-bind:key="index"> 
                                                    <aside class="noter-pic">
                                                        <img width="50" height="50" class="picImg" :src="comment.avatar">
                                                    </aside>
                                                    <div class="of"> 
                                                        <span class="fl">
                                                            <font class="fsize12 c-blue"> 
                                                                {{comment.nickname}}
                                                            </font>
                                                            <font class="fsize12 c-999 ml5">评论：</font>
                                                        </span>
                                                    </div>
                                                    <div class="noter-txt mt5"> 
                                                        <p>{{comment.content}}</p>
                                                    </div>
                                                    <div class="of mt5">
                                                        <span class="fr">
                                                            <font class="fsize12 c-999 ml5">
                                                                {{comment.gmtCreate}}
                                                            </font>
                                                        </span>
                                                    </div>
                                                </li>
                                            </ul> 
                                        </section>
                                    </section>
                                    <!-- 公共分页 开始 --> 
                                    <div class="paging">
                                        <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
                                        <a
                                            :class="{undisable: !data.hasPrevious}" 
                                            href="#"
                                            title="首页"
                                            @click.prevent="gotoPage(1)">首</a> 
                                        <a
                                            :class="{undisable: !data.hasPrevious}" 
                                            href="#"
                                            title="前一页"
                                            @click.prevent="gotoPage(data.current-1)">&lt;</a> 
                                        <a
                                            v-for="page in data.pages" 
                                            :key="page"
                                            :class="{current: data.current == page, undisable: data.current == page}"
                                            :title="'第'+page+'页'"
                                            href="#"
                                            @click.prevent="gotoPage(page)">{{ page }}</a>
                                        <a
                                            :class="{undisable: !data.hasNext}" 
                                            href="#"
                                            title="后一页"
                                            @click.prevent="gotoPage(data.current+1)">&gt;</a> 
                                        <a
                                            :class="{undisable: !data.hasNext}" 
                                            href="#"
                                            title="末页"
                                            @click.prevent="gotoPage(data.pages)">末</a> 
                                        <div class="clear"/>
                                    </div>
                                    <!-- 公共分页 结束 --> 
                                
                                </div>
                                <!-- /课程评论 -->

                            </article> 
                        </div>
                    </section> 
                </article>
                <aside class="fl col-3">
                    <div class="i-box">
                        <div>
                            <section class="c-infor-tabTitle c-tab-title"> 
                                <a title href="javascript:void(0)">主讲讲师</a>
                            </section>
                            <section class="stud-act-list"> 
                                <ul style="height: auto;">
                                    <li>
                                        <div class="u-face">
                                            <a href="#">
                                                <img :src="courseWebVo.avatar" width="50" height="50" alt>
                                            </a> 
                                        </div>
                                        <section class="hLh30 txtOf">
                                            <a class="c-333 fsize16 fl" href="#">{{courseWebVo.teacherName}}</a> 
                                        </section>
                                        <section class="hLh20 txtOf">
                                            <span class="c-999">{{courseWebVo.intro}}</span> 
                                        </section>
                                    </li> 
                                </ul>
                            </section> 
                        </div>
                    </div> 
                </aside>
                <div class="clear"></div> 
            </div>
        </section>
    <!-- /课程详情 结束 -->
    </div>
</template>

<script>
import courseApi from '@/api/course'
import commentApi from '@/api/commonedu'
import orderApi from '@/api/orders'

export default {
    asyncData({params, error}) {
        // return courseApi.getCourseInfo(params.id).then(response => {
        //     return {
        //         courseWebVo: response.data.data.courseWebVo,
        //         chapterVideoList: response.data.data.chapterVideoList,
        //         courseId: params.id
        //     }
        // })
        return { courseId: params.id }
    },

    data() { 
        return {
            data:{}, 
            page:1, 
            limit:4, 
            total:10, 
            comment:{
                content:'', 
                courseId:''
            },
            courseWebVo:{}, 
            chapterVideoList:[], 
            isbuy:false
        }
    },
    created() {
        this.initCourseInfo() 
        this.initComment()
    },
    methods:{
        //获取课程详情
        initCourseInfo() {
            courseApi.getCourseInfo(this.courseId).then(response => {
                this.courseWebVo=response.data.data.courseWebVo
                this.chapterVideoList=response.data.data.chapterVideoList
                this.isbuy=response.data.data.isBuy
            })
        },
        initComment(){
            commentApi.getPageList(this.page, this.limit, this.courseId).then(response =>{
                this.data = response.data.data
            })
        },
        addComment(){
            this.comment.courseId = this.courseId
            this.comment.teacherId = this.courseWebVo.teacherId
            commentApi.addComment(this.comment).then(response => {
                this.$message({
                    type: 'success',
                    message: '评论成功'
                })
                if(response.data.success){
                    this.comment.content = ''
                    this.initComment()
                }
            })
        },
        gotoPage(page){
            commentApi.getPageList(page, this.limit, this.courseId).then(response => { 
                this.data = response.data.data
            }) 
        },
        // 生成订单
        createOrders() {
            orderApi.createdOrders(this.courseId).then(response =>{
                if (response.data.success) {
                    // 获取返回的订单号
                    // 生成订单后跳转到订单显示页面
                    this.$router.push({path: `/orders/` + response.data.data.orderId})
                }
            })
        }
    }    
    
}; 
</script>

